16809436 has 12 divisors (see below), whose sum is σ = 33618928. Its totient is φ = 7204032.

The previous prime is 16809407. The next prime is 16809437. The reversal of 16809436 is 63490861.

16809436 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 16809395 and 16809404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16809437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300141 + ... + 300196.

Almost surely, 2^16809436 is an apocalyptic number.

It is an amenable number.

16809436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16809436 is a wasteful number, since it uses less digits than its factorization.

16809436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600348 (or 600346 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 16809436 is about 4099.9312189353. The cubic root of 16809436 is about 256.1637745983.

The spelling of 16809436 in words is "sixteen million, eight hundred nine thousand, four hundred thirty-six".